高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (03): 548-554.doi: 10.3969/j.issn.0251-0790.2012.03.022

• 物理化学 • 上一篇    下一篇

活性炭表面基团的定性和定量分析

李娜1, 朱健2, 查庆芳1   

  1. 1. 中国石油大学(华东)化学工程学院, 青岛 366555;
    2. 苏州大学材料与化学化工学部, 苏州 215123
  • 收稿日期:2011-08-25 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 查庆芳, 男, 教授, 主要从事新型碳材料的开发和重质油加工的相关研究. E-mail:upcqfzha@gmail.com
  • 基金资助:

    国家重质油重点实验室开放基金(批准号: SKLVP201102008)资助.

Quantitative and Qualitative Analyses of Oxygen-containing Surface Functional Groups on Activated Carbon

LI Na1, ZHU Jian2, ZHA Qing-Fang1   

  1. 1. College of Chemical Engineering, China University of Petroleum, Qingdao 366555, China;
    2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
  • Received:2011-08-25 Online:2012-03-10 Published:2012-03-10

摘要:

利用过硫酸铵对石油焦基活性炭进行了氧化处理, 并使用元素分析、 傅里叶变换红外光谱(FTIR)、 带质谱检测的程序升温脱附(TPD-MS)、 X射线光电子能谱(XPS)和X射线吸收近边结构(XANES)等方法对样品进行了分析和表征, 并对不同表征方法所得结果进行了对比分析. 结果表明, 元素分析所得结果与TPD-MS分析结果较吻合, XPS和XANES分析所得含氧量结果偏小.

关键词: 活性炭, 含氧基团, 定量分析, TPD-MS

Abstract:

The petroleum coke based activated carbon was oxidized by ammonium persulfate. The type and distribution of oxygen-containing surface functional groups(OCFGs) on activated carbon before and after oxidation was monitored using elementary analysis, FTIR spectrometry, temperature-programmed desorption coupled with mass spectrometry(TPD-MS), X-ray photoelectron spectroscopy(XPS), and X-ray absorption near edge structure(XANES) spectroscopy. The results obtained from these methods were compared with each other. It was found that using the TPD-MS method currently reported in the literature to quantify various OCFGs on the carbon surface on the basis of TPD-CO2 and TPD-CO profiles is significantly superior to the others due to its good accuracy and reproduction along with simple experimental conditions. Both of the concentration of OCFGs obtained by XPS and XANES methods are under the estimated ones.

Key words: Activated carbon, Oxygen-containing functional group, Quantitative analysis, Temperature-programmed desorption coupled with mass spectrometry(TPD-MS)

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